If both people are into it, and are capable of open communication, sure it can work. But as you're seeming to indicate, if there's jealousy on one side or the other, it's probably not going to work.
" I know its not right but i dont think i like that."
Well, it's a two way street. It's amazingly selfish that you 'want' to sleep with other women and think it might be possible to do that while denying it for your partner.
If the girlfriends I've had in life are indicative of women in general, no way I'd be down for an open relationship. It would just be an excuse to get with another dude without losing me as their emotional support. That's the worst form of inceldom.
Its a perfectly normal feeling and view of things. I went through that as well and actually had two break ups with my girlfriend because of arguing and stuff during which I slept with other women. Let me tell you its not worth it and you'll get over the feeling.